- #1
0338jw
- 42
- 0
Homework Statement
A yoyo is made of two solid cylindrical disks each of mass .050kg and diameter .075m joined by a concentric thin solid cylindrical hub of mass .0050kg and diameter .010m. use conservation of energy to calculate the linear speed of the yoyo when it reaches the end of its 1 m long string, if it is released at rest. b. What fraction of it's rotational energy is rotational?
Homework Equations
I=1/2 MR^2
Vt=r*omega
KErot= 1/2 I W^2
KEtrans=1/2MV^2
Wnc= deltaKE + deltaPE
The Attempt at a Solution
I have calculated the moment of intertia for the disks and hub and have aded them together. I'm not sure where exactly to go from here, so I would love to know where to go next. Would I use the hub radius and 2pi radians to determine the angular velocity? Do I use potential energy from the work equation? Please point me in the right direction!